Update git submodules

* Update docs/submodules/armband from branch 'stable/fraser'
  - u/fuel: Bump & rebase for ODL cleanup

    Change-Id: Ie23a49c17ab4890fc1262d1111efd85ec83d7866
    Signed-off-by: Cristina Pauna <cristina.pauna@enea.com>
    (cherry picked from commit 0d7a1834aea3bde3e27892919ae731b5cdae5560)

  - u/fuel: Bump & rebase for ODL Oxygen

    Drop obsolete patches:
    - UCA arch list extension (upstream no longer enforces the arch);

    Change-Id: I223964af674979f034a61aefff85c9f47af466d9
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit 13c73bfed1188a5e2c7355cf7eb5c5a1da006c22)

  - p/fuel: Bump GlusterFS to 3.13 (was 3.12)

    GlusterFS PPA now has arm64 binaries for 3.13, use them to drop one
    more patch and align with Fuel@OPNFV.

    Change-Id: I0769d6c3f34bb880fcd8f5ed70b0c2bf561d450a
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit 650b581cfb03cdd723541ec41ff3530391e4c76e)

  - u/fuel: Bump for Armband Pharos IDF changes

    Bring in arm-pod5 hugepage configuration et al.

    Change-Id: I98843c080ba2da7dc66ad3b22a8035d80e1975e2
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit da0725ba3dcbc8fed2b8847e8e789d62089f0020)

  - p/reclass-system-salt-model: drop openstack arch

    mcp-repos now has arm64 packages too, drop its architecture list
    (currently hardcoded to 'amd64') to be able to pick them up.

    Change-Id: Icefefe21111dc65713fde45ed9994e78e6b33ca6
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit 4dacfa496fa0a714835abed1267ee76ec979993a)

  - p/fuel: Fix ga-16.04 MaaS kernel to be hwe-edge

    While at it, bump & rebase for ODL VM memory bump & Pike staging PPA,
    handle architecture list for pike-staging PPA.

    Change-Id: I13cdeef0ae2167ff1b7e6dd9c188dfbdcf18d9a1
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit da4a72b2ee47253ae763752254fbd049155d941e)

diff --git a/docs/submodules/armband b/docs/submodules/armband
index 13c73bf..a47d407 160000 (submodule)
--- a/docs/submodules/armband
+++ b/docs/submodules/armband
@@ -1 +1 @@
-Subproject commit 13c73bfed1188a5e2c7355cf7eb5c5a1da006c22
+Subproject commit a47d40796dd33d61fca1dd5434855f977839e5c1